Guidance regarding reporting a bug probably related with VectorAPI

[Viswanathan, Sandhya]

Hi Joel,

I just now noticed this detailed analysis from you on the issue recently brought up by Aurelian as well, thank you so much.
Sorry I was not watching panama-dev closely and missed this altogether.
I have added a link to your analysis in the bug report (https://bugs.openjdk.org/browse/JDK-8321215).
Also, the corresponding pull request is at (https://github.com/openjdk/jdk/pull/16957).

Best Regards,
Sandhya


From: panama-dev <panama-dev-retn at openjdk.org> On Behalf Of Joel Knighton
Sent: Thursday, November 30, 2023 4:10 PM
To: Paul Sandoz <paul.sandoz at oracle.com>; panama-dev at openjdk.org
Subject: Re: Guidance regarding reporting a bug probably related with VectorAPI

This appears to be the same issue I reported in an earlier thread: https://mail.openjdk.org/pipermail/panama-dev/2023-October/020072.html. I can reproduce on an AVX-512 machine with hsdis, and the crash is at an indexed load.

Best,
Joel



On Thu, Nov 30, 2023 at 5:28 PM Paul Sandoz <paul.sandoz at oracle.com<mailto:paul.sandoz at oracle.com>> wrote:
Thanks. Based on the CPU flags I think we need to attempt to reproduce on an AVX-512 system.

Paul.

> On Nov 30, 2023, at 3:12 PM, Aurelian Tutuianu <padreati at yahoo.com<mailto:padreati at yahoo.com>> wrote:
>
> Hi Paul,
>
> Thank you for looking into it. This is what is shown when I run the code on my machine:
>
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> #  SIGSEGV (0xb) at pc=0x00007f89e053bcac, pid=398556, tid=398558
> #
> # JRE version: OpenJDK Runtime Environment (21.0.1+12) (build 21.0.1+12-29)
> # Java VM: OpenJDK 64-Bit Server VM (21.0.1+12-29, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
> # Problematic frame:
> # J 1119 c2 bugs.VectorTest.vdotVectorizedFailure([DII[DIIII)D rapaio.experiment at 6.0.0<mailto:rapaio.experiment at 6.0.0> (273 bytes) @ 0x00007f89e053bcac [0x00007f89e053b980+0x000000000000032c]
> #
> # No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
> #
> # An error report file with more information is saved as:
> # /home/ati/work/rapaio/hs_err_pid398556.log
> [4.582s][warning][os] Loading hsdis library failed
> #
> # If you would like to submit a bug report, please visit:
> #   https://urldefense.com/v3/__https://bugreport.java.com/bugreport/crash.jsp__;!!PbtH5S7Ebw!ffQA4oWz3uhNP7-Kx1ueAVxl9AMrQePX7u7dWdrEkjZEbUKcVuUQLBPa2aszsFwDHQQqS_x70iEHruTcTokBVx3CAA$<https://urldefense.com/v3/__https:/bugreport.java.com/bugreport/crash.jsp__;!!PbtH5S7Ebw!ffQA4oWz3uhNP7-Kx1ueAVxl9AMrQePX7u7dWdrEkjZEbUKcVuUQLBPa2aszsFwDHQQqS_x70iEHruTcTokBVx3CAA$>
> #
>
> The Hotspot error file can be found at the following link: https://gist.github.com/padreati/a0170291023640c013a9b9733478245b
> I didn't test it with other JVM versions than 21.0.1 and the Ubuntu machine that I have.
>
> Thank you again,
> Aurelian
>
>
>
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